The ARDS Definition Task Force developed a definition for Adult Respiratory Distress Syndrome (ARDS) in Berlin in 2011. This involved the European Society of Intensive Care Medicine, the American Thoracic Society and the Society of Critical Care Medicine.
References (Knowledge Source)Description
The ARDS Definition Task Force. Acute Respiratory Distress Syndrome. The Berlin Definition. JAMA. 2012; 307: 2526-2533.
Attachment
| Acute Respiratory Distress Syndrome. The Berlin Definition. |
Severity of ARDS (Decision)Decision Logic (Decision Table)
Severity of ARDS |
F | Number of features of ARDS | PaO2 to FIO2 ratio | PEEP in cm water | Severity of ARDS | Description | |
[0..100] | "Not applicable", "Mild ARDS", "Moderate ARDS", "Severe ARDS" | |||||
1 | 3 | >300 | >=5 | "Not applicable" | ||
2 | 3 | (200..300] | >=5 | "Mild ARDS" | ||
3 | 3 | (100..200] | >=5 | "Moderate ARDS" | ||
4 | 3 | <=100 | >=5 | "Severe ARDS" | ||
5 | <3 | - | - | "Not applicable" | ||
6 | - | - | <5 | "Not applicable" | ||
Number of features of ARDS (Decision)Decision Logic (Decision Table)
Number of features of ARDS |
C+ | Number of days between exposure and symptom onset | Bilateral opacities in lung fields on chest imaging studies | Number of alternative explanations | Number of features of ARDS | Description | |
[0..365] | ||||||
1 | <=7 | - | - | 1 | ||
2 | >7 | - | - | 0 | ||
3 | - | false | - | 0 | ||
4 | - | true | - | 1 | ||
5 | - | - | 0 | 1 | ||
6 | - | - | >=1 | 0 | ||
PaO2 to FIO2 ratio (Decision)Description
The arterial partial pressure of oxygen (PaO2) provides some information on pulmonary gas exchange, especially when viewed relative to the oxygen concentration in the inspired air.
PaO2-to-FIO2 ratio =
= (PaO2) / (FIO2)
where
FIO2 is the fractional concentration of inspired oxygen, ranging from 0.21 for room air to 1.0 for 100% oxygen
Semantic Link
| Decisions - PaO2 to FIO2 ratio |
Decision Logic (Literal Expression)
PaO2 to FIO2 ratio |
PaO2 in mm Hg/FIO2 as a decimal fraction |
Number of alternative explanations (Decision)Decision Logic (Decision Table)
Number of alternative explanations |
C+ | Lung opacities can be explained by heart failure | Lung opacities can be explained by fluid overload | Hydrostatic edema present | Number of alternative explanations | Description | |
1 | false | - | - | 0 | ||
2 | true | - | - | 1 | ||
3 | - | false | - | 0 | ||
4 | - | true | - | 1 | ||
5 | - | - | false | 0 | ||
6 | - | - | true | 1 | ||
PEEP in cm water (Input Data)